Attempting to import system-related schemas (like SYSMAN ) across different Oracle versions (e.g., 11g to 12c) often triggers internal preparation errors. Troubleshooting and Resolution Steps 1. Rebuild Data Pump Metadata
Importing a dump file from a much higher Oracle version into a lower version without using the VERSION parameter correctly. Step-by-Step Solutions 1. Exclude Statistics Attempting to import system-related schemas (like SYSMAN )
Data Pump can choke on metadata for objects that are in an INVALID state. Step-by-Step Solutions 1
Arthur froze. The error code ORA-39126 was generic, a catch-all for "something terrible happened inside a Data Pump worker process." The specific location— KUPW$WORKER.PREPARE_DATA_IMP —told him the failure happened during the data preparation phase. The job wasn't just paused; it was dead. The error code ORA-39126 was generic, a catch-all
-- Query Data Pump master table if import was running SELECT object_name, object_type, status, error_count FROM "<schema>"."<job_name>_MASTER" WHERE status = 'ERROR';